{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "881008194",
    "entityType": "User",
    "nonce": "0x905b39a2a104aee8106ea4fdb45abca931fd83ef0a0112213c001b06702dc0ba",
    "signature": "0x1ab7db3611edb1120a295e1c91bb698334465b86b80f90e5a6494387d41845df32932362353a9532ea16d50a05139d138ba083825fe348c25b084fb309a42b851c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}