{
  "manageEntity": {
    "action": "Save",
    "entityId": "428416",
    "entityType": "Track",
    "nonce": "0xfb45b75e13c255cead721a3183ea3905709a69156c6243bc5b6b21d675375880",
    "signature": "0x231965df9379373666c9c6bde3654aa1b7ada57f11557db8a804b17408838f087aec039523237b5a5f0e534930c9d11e450f7b741f19596d649fecc87ba65ce61b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}