{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "752372",
    "entityType": "User",
    "nonce": "0xccfa76791ea644dfbdd1f1de3d7c03e3f56080ee23df8ca714722f56f2b29d1f",
    "signature": "0xe2129bf61862f8fab5dc4c68c4852e1d0397ba686c0c833e82207f7a5657769733341dac40577d1435af168bac6dc74c7a3801a6e8e5d2964a1822ac125ba1451c",
    "signer": "0x7cb443E1D882339Ce2Db89944ef44929E8E2F578",
    "userId": "343301"
  }
}