{
  "manageEntity": {
    "action": "Save",
    "entityId": "1315665110",
    "entityType": "Track",
    "nonce": "0x2da3f08cf3affaa0833c54c7145578f1afed20efd26762a0baf775db40a824b4",
    "signature": "0x7230203f29e86f2c58601985bd7a907231bd1f7ab7ad45066f7acfc4d9e1325031e9d3260abbedf5ddbecf66c71b121d3b482b40efe47b9ff5a7740bd8fc8ca01b",
    "signer": "0x7848c1438a663A70aF2A2B1e61f7A9229dcc818e",
    "userId": "490080902"
  }
}