{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x9f02b18c97d7a6874b1ca2ff1e56236023761cc3f409d7a30946c8de1003a88b",
    "signature": "0xf80f2ccf0d7046b3c3bc7013a09a666636e47f74f4d7924189050e2f9cc9f0e81a5fe91d857412bd78e8fe70e2db5141fbce8e149e7369e54ce1d7618e7f920c1c",
    "signer": "0x200bde37e1742bbDD4Fc1D298018EFaD7448754e",
    "userId": "372725089"
  }
}