{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "223971",
    "entityType": "User",
    "nonce": "0xb20cd191b067656c2caaac00a2f122770dcde6c52f7b05c6220869894bc23c47",
    "signature": "0x72b87ff5051dc312fe1f15beec9b6a919eb066753487be6e317fb9dde513818320e31e355b84c7b23c97e1a201cc1d7faa4b6935ded80d7bd9f85269f676e4e01c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}