{
  "manageEntity": {
    "action": "Save",
    "entityId": "1218595498",
    "entityType": "Track",
    "nonce": "0xfdf439e526d1d42c4bff2dd02dae57fa942cdc291288fbe31f469d97bc98df17",
    "signature": "0xffbf673c7e1da180222859088ca35856e3849c0856c7bd1ab5c9f6f9c50c7eb974e85fc7238c54cde625a8b77b859969f49055b61f4c806e05283d76b2ad1d001b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}