{
  "manageEntity": {
    "action": "Save",
    "entityId": "1016486728",
    "entityType": "Track",
    "nonce": "0x3d59937d43f5eafaa88057d4956bc82d65a9fbc096d652bfdf151bb7fbb5b7f4",
    "signature": "0xf05d45281d3a1ceb2a9572e925b09f6442f2bbb8445f5eebfe30d5f9ffda11552fea794a782a2f501e9474e363a50259da9bee31cd8d7942dd8dd3a7ac0393051b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}