{
  "manageEntity": {
    "action": "Save",
    "entityId": "1309316086",
    "entityType": "Track",
    "nonce": "0x7bb9d9aee8a828951e9ec45e88b9892fb6ed01cbc79a4f89bf0a8b34a1647832",
    "signature": "0x36a7056c9ad4c929e78b9fe43ba8b09a6584461dbaf89a41f84cbb2a5d1a308d5c6074a4327c8a005b9a7f5f9b4eaca7797eeb1ace91b671d6c8518d0d409b511c",
    "signer": "0x2B28feb1CA15953a5a910C4E741698a24e8b3FE9",
    "userId": "887020893"
  }
}