{
  "manageEntity": {
    "action": "Save",
    "entityId": "765770461",
    "entityType": "Track",
    "nonce": "0x797e88677952a770aa2a03ef6a66988210803fc4c1a80c4a68e9460741d2251a",
    "signature": "0x1be2925f2d7244941b46d5dfb8437986430a1f4ee27216b2daf724e588a224872ce810db815ada0434f0e6d7b99d2d9b94e8c77e93ff40340ec7df7796773dca1c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}