{
  "manageEntity": {
    "action": "Save",
    "entityId": "1122917",
    "entityType": "Track",
    "nonce": "0x9984e155f5e5b6dd5d8f32bf1ba58d4798e539c610b76bc3888259981dc4b8b1",
    "signature": "0xdce0620040d1e909dd9c67b0adee977909ac78c6bfcb6556e5e0d1ba5df104962deb1f2df53da2e64d754afedc1a42333de61ee3a7fea732d48896ad067dd8361c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}