{
  "manageEntity": {
    "action": "Save",
    "entityId": "889826197",
    "entityType": "Track",
    "nonce": "0x07eb8ae4219992e815ad5450bd988e3d3aa2fc0aee833b73b857172c9177d9c9",
    "signature": "0x88c192c611e12eaad258675ad1b85fe06e80ad956b31dfc90f342f8f7a264bcf5321be10ed4f7813487e9ca8b559574eff65828cd94be1a17057054d50476ff11b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}