{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "13721",
    "entityType": "User",
    "nonce": "0xbbdafaf3a5a2d618fec4ed8a32f55b57505baf062941ae0dd4e8e04e60350a0f",
    "signature": "0xc9a6f78cf5e336b5dde46d7ef9d18752ea33fd19a026af3979d034ea535ce6377f8084c0348ed90d69d659df8087cfab8d7c54aa837876eae8279100b4896b0a1c",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}