{
  "manageEntity": {
    "action": "Save",
    "entityId": "212001826",
    "entityType": "Track",
    "nonce": "0xb3f30a04accd177b7418b2442b74a9dc8d07c06d42d7e41ec6a889f0714fc56a",
    "signature": "0x3f2eadfca8fc3487a0931ed7c8724551275209342356b7a9a0a77c8a010f393f5f480828d9297f4c327e31a57c35ba9060d0293c2334a0a468267792eed59f391b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}