{
  "manageEntity": {
    "action": "Save",
    "entityId": "1217737077",
    "entityType": "Track",
    "nonce": "0x4929cc270f18fc9055148db28c2744b41457dc4db78470a9d6c904d1d4134990",
    "signature": "0x2f77f94274721b7fcf42bf496217f15ea09599ad19f5ec19156790fa3878748c495ecb540b51178d97fc44767c2858ef3ebe570e360deefc1c29508cee2743521b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}