{
  "manageEntity": {
    "action": "Save",
    "entityId": "1938669936",
    "entityType": "Track",
    "nonce": "0x506710ecc01caa8909e49a7994b9f2d977464a65d1c0b3eb4b3a43dab205d14f",
    "signature": "0xba762706c2bf80ccf723fd34d76e7da049ea0c159e55a748c5a94b1edf6a18bd177dbb4dd5f7af05720a45bcfba18da7900ad1938ed2b247fe8e9e9b1b4d60d31b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}