{
  "manageEntity": {
    "action": "Save",
    "entityId": "1873442002",
    "entityType": "Track",
    "nonce": "0xde86ac9748795a79948e4075c7b4e13abe56f5559dc1bbee0da3ecb3b06fdf58",
    "signature": "0x1ac0891a1ff242662283b30ce1fd792a47812ab326541411b250b424c741825f325f925693c4294efe8234c1c3ecf4440ddaa8c8b48e0e675b1058999ab915631c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}