{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "420749",
    "entityType": "User",
    "nonce": "0x0d76112b92eb61bfba887d61de56bc1ed2a7408116b18de77503b20bc861ec71",
    "signature": "0x54ab0ff67c68a746694d1e9ecde7bf2ee2d66802fb598aa5344d1c08e9ca36e6044b1c3e520d40a187b5fa6190f238792203b3cdf8a36d1077490d5a768baeec1b",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}