{
  "manageEntity": {
    "action": "Save",
    "entityId": "806980720",
    "entityType": "Track",
    "nonce": "0x97c3fa060d1b705c8ba7169c9df87bbcecda757fe48eaff6997940e2966f7ab9",
    "signature": "0x6148dc6036e6c793571f2e1d248b95c28bc1138f93a9b9ad079145d412bcdb8a5d7c9c76487c153ab84684c154e5d005bfca3b476b66b8576f029e5acbc41e7a1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}