{
  "manageEntity": {
    "action": "Save",
    "entityId": "1913637930",
    "entityType": "Track",
    "nonce": "0xe9ae954861faa4a4c8a64df2088ab550666f3f5b262cc454090500358653a24d",
    "signature": "0x32d905dc938f51a2802daccf2a42297985b905bdd1ba5a420b1936a8df6585a800eb6c3195f8728e087ef0c413576b0b3c640012a38e87856bb0a2382c3f77ca1b",
    "signer": "0xBc5708e5eeBa74ea37A586d57F62BCEe7D3b4854",
    "userId": "109993"
  }
}