{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "550557206",
    "entityType": "User",
    "nonce": "0x0aac5e45e80aff476501c9e84b3c0c2c1402e47ca6638b382bd919486318b3db",
    "signature": "0xd5109f486685cedc2d7a50799d78c7ea4d95a9db5ea5ffc8fecb7879fd8507eb494705434e16c888682e839e480c5eddec0187b45fc8c7a81c9ca9f2dfb505b31c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}