{
  "manageEntity": {
    "action": "Save",
    "entityId": "854766",
    "entityType": "Track",
    "nonce": "0xf7ec95ce2a2627865bfd0ec690fa4a171a99035ac0b3267787a5c9483cd30c20",
    "signature": "0xef3a9b7582ec018934bba1f90a3ff42691712690e8c01e8c13f459a9d6322e63463e775e9487d5e7ed683f4dcdee1f9c8e86737baeaceffd1d1364868e6ea4cd1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}