{
  "manageEntity": {
    "action": "Save",
    "entityId": "1268158025",
    "entityType": "Track",
    "nonce": "0xc0cf2ed6b66f8d061f3d465b8b188280cc4ae15d4aad0c9534a0c3c71bd5a9d4",
    "signature": "0xa2d56f45808f3939631cce7cec8fe1617eacbfb51a2726af51b6cb3b9e30829e5010c274a986cbba0017f1e664a3a1bb9c12dd9f3d46daab56688fb5adf9fc971b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}