{
  "manageEntity": {
    "action": "Save",
    "entityId": "1500010968",
    "entityType": "Track",
    "nonce": "0x9537f6568bf97aad8e80a13a4d27ef7f07764e0b4844c3328616987470bef559",
    "signature": "0xa56a4ad3772f8de7488181ba21657c7395de58003d3592139b7c3e421defb3983f97ffa8eab86a7311129712b5588b8c78d2d34e8c50595e4d6e4ae0a807fd921c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}