{
  "manageEntity": {
    "action": "Save",
    "entityId": "880932117",
    "entityType": "Track",
    "nonce": "0x4815f17d539da05fe8bfc5ac4e39a81ed1becb83e5032bb9e6a58ef6e1e77c1b",
    "signature": "0x6ca956ceac280c927db01ff27382d5b05a7f016ba936f34de2ccee0408e53ca472a087d965afa7f5ca1b667b5b6ae7fbb0b9bb1b1e9039da8eb9ecd31fd742671c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}