{
  "manageEntity": {
    "action": "Save",
    "entityId": "77980511",
    "entityType": "Track",
    "nonce": "1789663192503248833",
    "signature": "0x3536df92a26a10f863a6fa64c7ce5cbb2cc7fbe89644a0019e008cbf2cd37a533fd0e0fce708ccc77c1e0c52149c5e87e8f7d321abc2946f9311600118792b491c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}