{
  "manageEntity": {
    "action": "Save",
    "entityId": "1772231858",
    "entityType": "Track",
    "nonce": "0xb624f9b16f5381b67d662892c17fbf3f7a79124584bf3f62ccf7a90d30f11410",
    "signature": "0xefde177aa6fb0cf84f4ae0646e6fcb3a06056c700cb07bcbd549ebd200a1b2083e3fefec0b94b1e1fd80eeb69f58770bfb01808f8e81e41cc726b9ce0bb37f661c",
    "signer": "0xc0621be31c1D1B62b94F2d48eE34dD3c3dA9D57d",
    "userId": "161438318"
  }
}