{
  "manageEntity": {
    "action": "Save",
    "entityId": "380498593",
    "entityType": "Track",
    "nonce": "0x44be55206c9fc6355beb93921a06002ba0db66b4cf3e9a31c767ef4d0e3c4b4e",
    "signature": "0x64eeca30897f0afbd02e09a62b7f996ab95a76bf17d0a7c9a17308cbfbdbaa6645177333ed3159f9602a888e3d7c182e11f534d5404e06ee71b8bb5991b9a4201c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}