{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "8449787",
    "entityType": "User",
    "nonce": "0xad81b7afdec044169cc61b3ba3137d119e3a05e01859e32ed03056630a074b7c",
    "signature": "0xff2d465cd0840b7902fb8a663c38bc1567f67880e5cb7f3aba6a5f3c6763d9a648df2718d0f2d488a5772b5993a09fb103c3c2881edb451731402fbee48610121c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}