{
  "manageEntity": {
    "action": "Save",
    "entityId": "1372068249",
    "entityType": "Track",
    "nonce": "0xce912ac9309e7560728dc1795b28dbfc7df4d8ba1383b728ae085c9dc7afc0e4",
    "signature": "0x9e9209ea939395588b09ec64785fdfc94db0a78d4d253e1c3b57c45a5c6674230f6ff1725f5932169b7c08e6d08167d10cda213f57a3d7919fb45d4a327dbc1d1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}