{
  "manageEntity": {
    "action": "Save",
    "entityId": "1017380576",
    "entityType": "Track",
    "nonce": "0x4210f2399b358dd95b9a84b921451aa0d959842155c3bb2d10c33433450f8ad7",
    "signature": "0x0131a29ddaff349eb3008b640c1d35f69b7354a73b68ad849ea72a8aeb8213a801f3a502efda13bbd070b3942ef8b0c7a980d8babb601265f191098bb78550881b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}