{
  "manageEntity": {
    "action": "Save",
    "entityId": "64905",
    "entityType": "Track",
    "nonce": "1790195345457022701",
    "signature": "0x838db91525b69aaaad65e7b480e24db06ccf405fb840cca63c229d100a9d495a1979c8867739d9a5e024aaa85ad0015b90ca11fcbf03380dfc5be2de2770d6931c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}