{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "308355",
    "entityType": "User",
    "nonce": "0x4742e6557d88e33642616ffeec14967677d1d9c4400e9138c9aca5692039fe47",
    "signature": "0x0f9ef4886c2902cc91c1f99a55c11f17cd04a3adf04e6c13c51c3e10b11e40f55a428f08878cbe27c7c5ba4901f640064b1cb0d178c58f1b2217e3294b0666ea1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}