{
  "manageEntity": {
    "action": "Save",
    "entityId": "1842682051",
    "entityType": "Track",
    "nonce": "0x477bac46549c62231d9603c32e138bdba34c9b5b646ee8ca122411e4fa77bbb9",
    "signature": "0x0716f2e0c40f46f983e77f620f19d5bfd00dcfb86b9e4ade944a3cf5355221af5c3c0a4b0eb42b9a6321d5338e0180f639f3e9a80027058dfa47a1f8659a2ddf1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}