{
  "manageEntity": {
    "action": "Save",
    "entityId": "1675939414",
    "entityType": "Track",
    "nonce": "0x8980cfdf5f01a54bd0e5a4239b14ac4a3192fbe0845623b6170133eb14b8be4e",
    "signature": "0x4e824ff50381ef3320258e943d290f6f1506ed97c2ce666dd354e7610eb687286a197c841bdd4f23c6c84a0375f7ba79856e856d300d4933704ea311a0add3511b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}