{
  "manageEntity": {
    "action": "Save",
    "entityId": "474373",
    "entityType": "Track",
    "nonce": "0xb5b6fed7e789cc23c39513e206d83d1caaaa1bbe56d89e926e1f0234a70688ff",
    "signature": "0xdad73263fddf53fe96183c3d3209bac9fc0736fc2c1271391b3ac788792297ed6685c2e084009ea267db4c0ecab3eb8283613fcb9e1535ee29e4e0d472ea6f991b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}