{
  "manageEntity": {
    "action": "Save",
    "entityId": "1685105582",
    "entityType": "Track",
    "nonce": "0xa40bd8b8f460b77fe1dc05641f8ff4061e73d6d00bf54c0e6ac9e5b7d04b2d1a",
    "signature": "0xa86d42365e69b32c36b29800cebe1d69a1289e21d1057c10da938411215bc55611ad3a2cbbef961584dc25c78b3ac157b49df125c21c3c7753a6a2c37a2b5cbc1b",
    "signer": "0x67E321241D4e44e5aB5D1c365505f0F33044C7BE",
    "userId": "460631539"
  }
}