{
  "manageEntity": {
    "action": "Save",
    "entityId": "652660796",
    "entityType": "Track",
    "nonce": "0xe56426ecf6fbda48cd465ce3ef2c53a3476c018c12be74d35ec60bcbb0aa9d9c",
    "signature": "0x7d4991606e776efe9320f7639564c8c0d28861fc991e68a2b44475d495548d34640be8a8b5cc73ec06d01c4ce1d2df576c0da56d2a348412e5d20e02121318671c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}