{
  "manageEntity": {
    "action": "Save",
    "entityId": "1661190045",
    "entityType": "Track",
    "nonce": "0xcd32df44cd925b9c78ff5144b62a28c04e479736b8935e2041d047ff8cbb61be",
    "signature": "0x9d25794d90a3169bf7061772375123a497e476cee2a34b939aaecc783a0d8c4c06a93f42f0df3867a5831506094761eb1a68fe86d16798c1dddd8b2ba472aee31c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}