{
  "manageEntity": {
    "action": "Save",
    "entityId": "1840192448",
    "entityType": "Track",
    "nonce": "0x7b11e4a07246c5d988e7a0fb2912f5e93ca578813e60e613cc8d28c0dc9c802f",
    "signature": "0x831ed84b3131cee49ba99aead9f4793a863b5c6a36eb3733795400cd91232b571124aa61c7cbbf76e378f8ca058c8967f39eac353fe89e966fc079e031b386ec1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}