{
  "manageEntity": {
    "action": "Save",
    "entityId": "51354",
    "entityType": "Track",
    "nonce": "0xeafcb4dd7e07baa5edba6036580b72cc5fd99ecacd80041914135f00606c7d5a",
    "signature": "0x91284854b55bedbe49fcecaa64033b9006a7014b074d653ee9f0ef3bce5f783c7b014a65927014ab429c4396a078be9d58f06a6b5a721492e03e35a5b9a926c41b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}