{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301637",
    "entityType": "User",
    "nonce": "0xfc8128bdc6e3dcd3e0f847b76b2be368173f191780a643c69d688578f710bb78",
    "signature": "0x0a8a1fb003f72c18772967e9891e3a9a1fa72f25023f553be769ab9f41bb378171ee23ec2c6cc5ca98ee7c19010aa99bd4d5bfe7dd3d55517e8da34aeaca42801c",
    "signer": "0x643a7D01c8D4d435f9263d6dE2d6C2C3352e70ed",
    "userId": "305151012"
  }
}