{
  "manageEntity": {
    "action": "Save",
    "entityId": "617275478",
    "entityType": "Track",
    "nonce": "0x167ae0047c858670c5ca4b6167e78d6fe82127604e149fa6766398b8f429855a",
    "signature": "0x42a81722b38d1ec5fcf834ae25593d73ec625a778374f5ea2c98b69ac92088fb75a87f280fc036f576994434e7d6d9fc487511d1b7d1f520f5ef07f2ed214ab31c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}