{
  "manageEntity": {
    "action": "Save",
    "entityId": "1902008518",
    "entityType": "Track",
    "nonce": "0x7afb7e7192c8f22a9557eb56ff40cb3676056d2b20b5a493617c64322997e640",
    "signature": "0xd39fddcbd3c271a7dd28b13cb6e160f38f8c663713d7720a05c637aebd4c38ba123ded3d2371d7c238cc5cc22ff3594ce106c223f3301f769deae39b32d0a30b1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}