{
  "manageEntity": {
    "action": "Save",
    "entityId": "701023777",
    "entityType": "Track",
    "nonce": "0x6b8b8950bf72b202711be8f88a88bd003cabb82194a17b77f755a5e643e88794",
    "signature": "0xbdea3c968a567b6472b13c202924ab04cea1a0b5dd42a88733028bedaedf00155a84941b70d9af8abd99aee03feef827c3cb48c429b5cbe0a5d021a9105b8b881b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}