{
  "manageEntity": {
    "action": "Save",
    "entityId": "1438588497",
    "entityType": "Track",
    "nonce": "0x2d45eb6123f31496f37113a080e13ea67c4073a05e826ce7853fb23b5796cfd1",
    "signature": "0x7e1ade42ef4c00552b40c9ff575dd37fd404cf458e269db512356f7e7cc816e46f638bd5b78c91cb0b9bea57dad28bef62f5bb6032afe90c09a0e1357d4a9e861c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}