{
  "manageEntity": {
    "action": "Save",
    "entityId": "271878",
    "entityType": "Track",
    "nonce": "0xc402ce505cb3fd11e4bd2a8dce0363cdd79b4039078118b09ebd7e3f750f6cdd",
    "signature": "0x9fc74764f52ad6208cd799b9d52835578a1523c0c1fea6328206290c52bac7c44f65ab95806a92ddf29dde6fdd6a6f8579164da612630f16f51465d61c8b958f1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}