{
  "manageEntity": {
    "action": "Save",
    "entityId": "1748508455",
    "entityType": "Track",
    "nonce": "0xe31b7c2a1d3c309c4855144e5207c17121742af197d30e3600cfe3e01bbc661f",
    "signature": "0xbdd799a3cd02a9f370d7743a9aee497edc02f6b61c340d172b376319d73fe713148d9d8e5fa171e11249eec1c79c61629a07bd08ead3c7dd653d58e80e75cf3e1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}