{
  "manageEntity": {
    "action": "Save",
    "entityId": "2117352039",
    "entityType": "Track",
    "nonce": "0xc1d4900fbcf7766b16c2f29e5bec8b45ac4f48dba7b03f21f778abb69d4dd1f8",
    "signature": "0x59fa3b289430643a234758d3e1ca35252b94219235488873b9eaeb4228bbfc875c755b5926d49715dd26263fcef6337b197448159b9e676f7abf64b0f54e91c21c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}