{
  "manageEntity": {
    "action": "Save",
    "entityId": "1242379660",
    "entityType": "Track",
    "nonce": "0x5de0b477e1b862a8be0eef96fcde83857ec50aa9c41dbf2ff3efcb2f955f0059",
    "signature": "0xe93713f29a172dcf801d4b40a51ffe18263af97d2be7cdb1d86b2d299663ce293cd664abcad5db67b820516e07bf374377c052448277d916579180f759e2637a1b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}