{
  "manageEntity": {
    "action": "Save",
    "entityId": "352834399",
    "entityType": "Track",
    "nonce": "0xd8a528d28ee4b8e1be5cd012cc45414db72f94c97c8af05085ab70978fdaf69c",
    "signature": "0x8a24b8458a92c22071d92a52d670b868d5d4cabbfa792e7e310b9738f9c8169c50ec26b03023861d56ee49899f6c62a69855de285ccad031aa11a620d42eba551c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}