{
  "manageEntity": {
    "action": "Save",
    "entityId": "816272999",
    "entityType": "Track",
    "nonce": "0x2e8c5de62eceab656de4bb4bf96f62d7f2874d46bc94ae85e6c6238941defae0",
    "signature": "0xa285d7a5987036d51816648deffc86a17d31b8537951445e24126552ae8a701b2f3db661dd12c2fbd60ae2e7edbec7331ef2f69500e6e6827c0f3f75ecafae171b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}