{
  "manageEntity": {
    "action": "Save",
    "entityId": "1919925508",
    "entityType": "Track",
    "nonce": "0xc8c8f5bdb2d768af4c5e8cbf371609aaf8d0d96b27850ffe3aec9700a29c1822",
    "signature": "0x26ef85b7666a2ca2b0d30c3af17a6ac1ef1bfabba4d66dffa17f5b193e8a8ea96c710f6a508ca699ab06c4b1bed041c4d16653815bc994fbf818ec187ae6ce801b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}