{
  "manageEntity": {
    "action": "Save",
    "entityId": "1688892408",
    "entityType": "Track",
    "nonce": "0x4fc049a213b9072a37e809b033d386d193a23fcf39a3454ba7b744b770eae780",
    "signature": "0x141569067f8dfd1689ffec66bb0e4ea4b16fe93edebe0113f470ee2ede3eb500008508165a20a910b265d0ecb9336b9b71fc7238c8da1559120ef56ca10f636e1b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}