{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "991601",
    "entityType": "User",
    "nonce": "0x64e5d1a0e8031d07cff5b33c964c3d151b877b5d2e76590647314a333389ced8",
    "signature": "0x656eb272f8864eb93be565b34d84ca703cfc0389ebd75d0eaccf8c1d34e6e2974ceddfcc462f030f2ccbba484e0b2e39eb03b6673cfe287d94eb0cb56d3fcbaa1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}