{
  "manageEntity": {
    "action": "Save",
    "entityId": "1854944736",
    "entityType": "Track",
    "nonce": "0x5fa12d00ac9d6e57c8f627526dc8483f440f60c0da65aac6bc966a381cee1b3e",
    "signature": "0xf450704203c8c6149a355bd14adb2795a7bad0c99e22fbe528c0dfbc2ceb3276525abe7ad1c403f71ba19166f45c7badae8602c369781e985204942ca417253e1c",
    "signer": "0x06Ad5789cE045C5B0AeB97849051a7385CA95B4a",
    "userId": "270209897"
  }
}