{
  "manageEntity": {
    "action": "Save",
    "entityId": "53938335",
    "entityType": "Track",
    "nonce": "0x17a66430c08a26f1d9cad9e9904d255b9803740c6822ace5594a83341fec27d3",
    "signature": "0x8de2fd2f10b4f8be34dbec3a66d878f7aa19696cb6704919168cfdb3390c966f5142b553d4afbb20994c1728cf1ab5f50f4c30662d203547694396f020977b8a1b",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}