{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21559737",
    "entityType": "User",
    "nonce": "0x645f5423b485a15f38465f8df87fd110c3a26cb0fbdba3e021fa48401d95bcd9",
    "signature": "0xf3b427e55f69a42dddf6d258f588bccfce8e3dc2e3a506dde13084906b7ea2464ae97e0040b509aa833e3e3d3f79d03bed10c3499efb5d64db3c477165aa081e1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}