{
  "manageEntity": {
    "action": "Save",
    "entityId": "322073390",
    "entityType": "Track",
    "nonce": "1790791640740104675",
    "signature": "0xc70aa28dfb26df50c08d049cb41b4d50241cc79367ab0dbe9cf9c77fe616f5815ce85849356daacba9771802068b181440608f6f50ef099d64e92531fb8f2aee1c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}