{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "722853",
    "entityType": "User",
    "nonce": "0x12717f197795490ae7b099bf569d178682fcd81a28d9fbb125abb88af18a0bfc",
    "signature": "0x68b0075cdd4f9925ebe25882747d16d898d34ffe23f36aab99d40630acbe878052367b06a352d6f2a52ddfa51bcdb666bb951722722cba561b43f2e7ba3ea9481c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}