{
  "manageEntity": {
    "action": "Save",
    "entityId": "219626995",
    "entityType": "Track",
    "nonce": "0xbe8eb3f320026dbf71c66d5047f94383fb527aa9ce26c65bbcafd50806f7b8c8",
    "signature": "0x69287c44c9fdecd81606f3aa11a9e521e5a21a4120382856ac31d10b7b312bff66948e85c2f8b08782af644efb3eb790f8468acf90b5b3d74b269a0975f00ef21c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}