{
  "manageEntity": {
    "action": "Save",
    "entityId": "401898449",
    "entityType": "Track",
    "nonce": "0x95968a17cfdc9dab1315414da79e771a64f5240cc942886afbfe65ed3d901110",
    "signature": "0x5ff7129a725010f5346658a62f972ff2b08e0df99dffcd9513cde3d8c60cf3592fef2f37c5a4b5131828372dd600feab1afce440106b08095803f40db0da429c1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}