{
  "manageEntity": {
    "action": "Save",
    "entityId": "1374232144",
    "entityType": "Track",
    "nonce": "0x760a7d9bf081bcb75ecc7c497fbf2dd561821cfe7ae505d007a6e535fd613f6c",
    "signature": "0x087c23a510aed1df904bb4928fb0c412baeefd079662779ce690d70c8fa3c772019bce3131c266a416fdcce17583644a2a0166101235dbf045cc8b6c3cab5fa61c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}