{
  "manageEntity": {
    "action": "Save",
    "entityId": "428872",
    "entityType": "Track",
    "nonce": "0xc96fb808a42649fe8b19c01c661af524246fa08913dcf3fdb455dc3f0de73533",
    "signature": "0x5552a2239240b14592c9d5ca8a2e7e4d6d4a3b1e1fdd61b4d89968c601ea06a43f0f6eca7553bf9f1d9dda812c7be3b74761c963394b1b1855fe86abd337f2a81c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}