{
  "manageEntity": {
    "action": "Save",
    "entityId": "273519",
    "entityType": "Track",
    "nonce": "0xe33365a467e54f6c5fb2791e4732f93beb8f93c3c4066580e4f5150281d29b22",
    "signature": "0xdb46d0c9349fe31f0c2321d9ac8e8460b72de8bcf3bf98692a4031c2fb6156ff3b0e0c68f9f80d519e41f2729f0b7fc855720615afd6057ce075da00a0e236d81b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}