{
  "manageEntity": {
    "action": "Save",
    "entityId": "523376990",
    "entityType": "Track",
    "nonce": "0xdc2c0ec5f060dcaf5196908f24193f7c854753e0ebeb9ea569419aba549b461a",
    "signature": "0x8ced9c3a2579bbf76ddc3789e8b40cb6ae32f71da46f207105f593ca3ce491ff5aa9c1d0d7abd6f5a6f45a512786787fc837d1f9b890948e9d5c52d145b302251c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}