{
  "manageEntity": {
    "action": "Save",
    "entityId": "1895052938",
    "entityType": "Track",
    "nonce": "0xfc64b766afe74e7901b1760f0beab885d1fc9a009f03318675e4a2bf657dc219",
    "signature": "0x99a898dfd36fb3f9c86d320d281e97c64513239640a4b8c77dbfe7705fcab60c46c6ada932a8904d28bd4cc03e703c635267de73618fc055f326ad0837a263a01c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}