{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xfe0e4ec044b72270c2fe63a31c3714b680b094d8a02ff7cc01038ec5f417694c",
    "signature": "0x7a2d0d816fbd93750e83ae23931c76cfd86f5b4e1ba57f44ebde6f51e8abce6327a97a646fe05980d2d4ce0516f00b9aec13496fac2c56cb823def1dc37c85071b",
    "signer": "0x18572ad7cA3F323e798F548aCD3bc9e16375BFf8",
    "userId": "740199780"
  }
}