{
  "manageEntity": {
    "action": "Save",
    "entityId": "177749489",
    "entityType": "Track",
    "nonce": "0x543055d1ea9d02db456b85dad0b9379b1e0aaeeee600ab64f92957a97a337f5e",
    "signature": "0xf373cbe705b38f0389eef83f2d58b136f3d5154efeb8d15eba9436565a88d47e518978fda2b5443942ad281d7b5224bb481617e5aad71a069e591754085f57931c",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}