{
  "manageEntity": {
    "action": "Save",
    "entityId": "1263180722",
    "entityType": "Track",
    "nonce": "0x7e0dfe6f9b0704f460b1fd001de32d63128735d0cfa26c1b13ba75ef8aad71a8",
    "signature": "0xaee248ec1c16d98d69aa323503138afbad4e014ef3f1a0e026eeef82e3e4302422631266ca494fcfc3ab144fcb5f085c2d27fdcf6b3e11efb24cba2f2f395cb31b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}