{
  "manageEntity": {
    "action": "Save",
    "entityId": "463157434",
    "entityType": "Track",
    "nonce": "0x908ba17dedefd0ba0ac3a746636806d4f5ce8ffa22fd77cfa1ccffecef865bad",
    "signature": "0x53ce9a33626c5d0c25ea45d4868eb480f1825a5d022e239a594bf625089c326b2a5def4df1316c6aa9e1dee70b1a3f2e239c44432e67cb7d4a12aa94601446bf1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}