{
  "manageEntity": {
    "action": "Save",
    "entityId": "1090390403",
    "entityType": "Track",
    "nonce": "0x1f06df9dab4ca452753ae80e13533484d831c58f9a6a1ad64efabf377854c162",
    "signature": "0x777bb9116d878df420c23761a3253dcb9dec9bd44efadd8ed2bc0fb31a3656506b50490111b013a7767f2241696eff52fdbc076e87176133c1809bdcab4029d51b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}