{
  "manageEntity": {
    "action": "Save",
    "entityId": "778715473",
    "entityType": "Track",
    "nonce": "0xf25b314c8dc91f4075190571b5cecf6d58a26c93868d887d96184e6ba676e4a7",
    "signature": "0xc7f5a1f17e01a42a8b0534946cf52c2e3d83cfe293b8362ee72447e4c591ccfa6acb1ee75d5e5966e047dde740ddafa44f13aa329418110139c83fab136bcabe1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}