{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1881080",
    "entityType": "User",
    "nonce": "0x8e654112929daa2459b450c6040984004d53fb503edd2aa69b46f5bac5c65dae",
    "signature": "0x327bc777a285e9d8630e37f36c56a13296ccac7fe971031ecc441c9c2cbb5e886a2aefd7a9b0fc15e22dc2b12f8b9d52f6fd50aeadfe20ecb6cf7dbe0e79872d1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}