{
  "manageEntity": {
    "action": "Save",
    "entityId": "774845290",
    "entityType": "Track",
    "nonce": "1791037968016849268",
    "signature": "0xf055bf33958e1879803ecbb1056dad2f2f29584a763531a82a684191f0fcc4d343ff299742e33635638a2094bf355b6de7c5575b1c146a802a4b68befc8fa7d01c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}