{
  "manageEntity": {
    "action": "Save",
    "entityId": "268416303",
    "entityType": "Track",
    "nonce": "0x5c72ce98cf14174fa18a6f94fd3f9e1ab15d73d2a6b81fb205a3c0f44c31cb6c",
    "signature": "0x27fa31462b51b3007f5d3fbaebfd0b40a29e8fb48f7bae137a211f9c9f1b413c4b15de9630ee6f4bdfeb287f8a5543f5f90938a45a335e1950561da7e5a8ca521b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}