{
  "manageEntity": {
    "action": "Save",
    "entityId": "985710",
    "entityType": "Track",
    "nonce": "0xfae3a286ec26dafefa06fb77cce2b61d8ffd535383977a0b1108c035bac944e9",
    "signature": "0x4d7db914a6d80709252549df5595455f4a3ce31336136c2850393b90782a165a0e522fe3afa028e6c2eba85229a05afdd75ec75206f506278bab7ee6a53d11351c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}