{
  "manageEntity": {
    "action": "Save",
    "entityId": "696114637",
    "entityType": "Track",
    "nonce": "0x2a247dcc2ddef978c9e8a0f750249616e92e2c674eca344ccb3a7281be200287",
    "signature": "0x0febe364d80b8b821485b1cad4b3bd754116cee4bc2d952676f910482800b93a756ba6328a68e05801f9da8891356aa7d1136827e7e08015619c9d4d3fd7e91b1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}