{
  "manageEntity": {
    "action": "Save",
    "entityId": "2004421075",
    "entityType": "Track",
    "nonce": "0xb861f65fa5457f32176900984557307245efbd8ed33c166313dc747ebcb2c62c",
    "signature": "0xbb9efe7dffd8c4ca94d3a96b65735c6365da93a64f26b5d813e3a5af07e82ada7315a339a5908bcbb30450117738019adff9bf3bda17f47d7a4af688b97ef0cb1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}