{
  "manageEntity": {
    "action": "Save",
    "entityId": "255400167",
    "entityType": "Track",
    "nonce": "0x0e29930f01a9966f519bc95c64db9062270dae1f0a3bb7e3eedb16b83de55aee",
    "signature": "0xfded54eb910ca1551be59ad74df1ea0a8d1126246ebeb2f91af881866ad46920465555c3cfc8d697ae83ba067dadce1bd99a5074885cf4203ee93f37aff617c81c",
    "signer": "0x48997477d821e30d3Fa835d1Ee7809B3253Cb100",
    "userId": "75085"
  }
}