{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x306306afdd87f956b34204a1dda32c6f766d89ebfa4faa904ad0a2df36288e4e",
    "signature": "0x57116e5f39e47cd683341c1fedd4f4ecae29732b95a64e9e6c1cfe2aff753e4e44b804dc9d4fca06796bdcdf49af5a4aaf100c74a65cfe44d3898489fc34688f1b",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}