{
  "manageEntity": {
    "action": "Save",
    "entityId": "718640683",
    "entityType": "Track",
    "nonce": "0x15af2543c16375a1d88380b349b489219d3f392fe41f34a12a6de8133fdf9868",
    "signature": "0x73c22d5559a17977bd39154a49705dcaa01334c80e6876454ea1680105c09d4f1185c810f4faac866afc7b182584099329c05171fdbef851de884242a42c81261b",
    "signer": "0x46e7101c875D60D850099f5251d848716a5CfB80",
    "userId": "87961106"
  }
}