{
  "manageEntity": {
    "action": "Save",
    "entityId": "822200972",
    "entityType": "Track",
    "nonce": "0x125f92da5b7f462d96419179d05976b3515452ad1abd53cf680d1e0e3b2ebd94",
    "signature": "0x7cae6a3c14971f47a038e9820d94c4a8fb3e1c92ec95420793a4f18285ad55c42d2f51f827dcf2af5ef7fc645eef0623f5519a0ff7434104dca2a3e8ed75f84c1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}