{
  "manageEntity": {
    "action": "Save",
    "entityId": "586465046",
    "entityType": "Track",
    "nonce": "0x783d49f8ca9770dd3c845f02de26beab8a226929b95bbda65740773cdbcc52fb",
    "signature": "0x5a850e76988dcc2f408d277526dae19b8bdffd50ca725561122fe15aee684906515af0dd13b59f61ddc94a008b2d19e70f4d13641befd9c52a51f5d49e27b2391c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}