{
  "manageEntity": {
    "action": "Save",
    "entityId": "293472",
    "entityType": "Track",
    "nonce": "0x6c1bd25f6f1630da2692c7d23c9434e71cc3bfc30a40caf3721390ab7baa2965",
    "signature": "0x93fce901c42928ccd92b86ef287b6f02360af5cfa9edb53819203e8170e87f43682c2f0a33d0367e313559b1746fce6f7a0efbda6bafe64740ca4e6363430e521c",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}