{
  "manageEntity": {
    "action": "Save",
    "entityId": "1136960728",
    "entityType": "Track",
    "nonce": "0x4460df3e6af74d6a48bb05616edfb45ab68833d8c5712387612966fb3162021f",
    "signature": "0x1201a27deb59b9584a8f6cdede1ba2c8db97e47b5b261c8b4a9036e3c1f8156b44e332634ab85611a060e23520eab34226aa24b60e198cdf6dc5e252915001661c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}