{
  "manageEntity": {
    "action": "Save",
    "entityId": "706797",
    "entityType": "Track",
    "nonce": "0x67e51ffe5b3e4e96163d2d7be18ff64486ff0f86293308ac6e0e89a2770890eb",
    "signature": "0x94128341e16e38e79a1a75894e2d501465bef434ff8e4ff148784dabb18e2847707f2def09c510a61d34db2651acbba4961d64f496ac4221e7787414c023f5c01c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}