{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xeb554898f877c74f7a131d5d54db93b0511c9dc9ec9755840d9d54d92c7fc0a4",
    "signature": "0x3d74ec8307facf8cac49aa8626b69312b64b3f6484f8cb8bb7fecdf9c064286915c7c078b04aca11394a5dafb0d705bdb187ca9e066324f620d9250fbffd0e5a1b",
    "signer": "0x7F0a55b3F89565bCCaD245f04DD78264D33C1aB0",
    "userId": "615453040"
  }
}