{
  "manageEntity": {
    "action": "Save",
    "entityId": "873667497",
    "entityType": "Track",
    "nonce": "0x204fee8679d42ff42c42154bdcd62862f642996cd4238efe0c39309ae9f0470d",
    "signature": "0x38f8da76970030daf14a3fa34c8c5b8f328a9146ac6f26ca4a0b88f2017acda1514b9eca8e79c6ac711887060cc151349026f0421c44ded38df019c7c758578a1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}