{
  "manageEntity": {
    "action": "Save",
    "entityId": "2109845180",
    "entityType": "Track",
    "nonce": "0x7f9312381d7584c19c04679bf8a627aef7daabfc3b4cd53418fad7e61112f5f8",
    "signature": "0xff5413731688005a0053dc0c88c1db396e100ceabe705af3f3c74fd67203351c3e1696215a74aaa8d9afb4107a896e6654721cf42fcabf20397d102bc8d24aad1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}