{
  "manageEntity": {
    "action": "Save",
    "entityId": "1442212617",
    "entityType": "Track",
    "nonce": "0xcf90630ee7c3386e610081984cf30b320692bbe8c086daaddbf8b814c4155d6a",
    "signature": "0xf50c9cf1905fef96d79f4b112b647050c4eb92550657b3ed843449cb355521697f0061ddea0100c5e6bb13b0e92a4f40d7bc18bcd6cfda6aab514a2a2e1960301c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}