{
  "manageEntity": {
    "action": "Save",
    "entityId": "520022974",
    "entityType": "Track",
    "nonce": "0x04e7ce56b54eca11d635c8e497f43335e3f1f3397c585c28aed1017c7ff98bd9",
    "signature": "0x832ea695f85f0eaaf7c1cc9a18f2441abaf5707e35f7b4c5a1ca5778a4ea16f609c77782e5f990c9e9d196c14ec30eea9a3f49639ba77e8738c8e2b461b4f2931b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}