{
  "manageEntity": {
    "action": "Save",
    "entityId": "688243571",
    "entityType": "Track",
    "nonce": "0x6ffd9ba46085c3eb112444a2362a472fe9e49e61266299ecf3ee97e76a631fc2",
    "signature": "0xdcfe0c3097c2923f6a5e2422d827e3771e82e06b7df6fb13e75f25c2aa4ae51c50e57a63edf92f721d7390ab9e992e361c04fd59e3fe57f9980383c13894fa5e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}