{
  "manageEntity": {
    "action": "Save",
    "entityId": "2045921796",
    "entityType": "Track",
    "nonce": "0x9286e5958bb547a2991edb52c60bd9c6b5c7fbf929a810f3bf30c314e6593b7e",
    "signature": "0x42e065b88c6ab1774719743d07a7ef6b2b2c777507b93b34ffadbc9bd29abf5f121fe99342960d63f8d153721f1850621cba1812dbf6c327aab88d86fb9a92d61b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}