{
  "manageEntity": {
    "action": "Save",
    "entityId": "1677224463",
    "entityType": "Track",
    "nonce": "0x093348ac9e428091a1b462c42a330238c48999b97ac3cbc374f8dab2e3d943aa",
    "signature": "0xd09a72b715c4ce6e9b1ef4eb1538b3defb7a04fb2d370ca5dd2bcd74d83d958411622015e71543a56dacd224115a147a0326e2cf40fb65bf28634b029505253c1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}