{
  "manageEntity": {
    "action": "Save",
    "entityId": "130608",
    "entityType": "Track",
    "nonce": "0x35d5bc3bf58599f668a96779b0fade619f38adb64b7727ff9517e38b6fa1a18d",
    "signature": "0x90ccefc3131e640b95199a07db73cac89bef48db6555210ddbcff502933fb25d5a804ef9bd19a1248452773ac2dc7aecc1a6a0c1de2f2b9e914921579c8b50061c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}