{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "900751573",
    "entityType": "User",
    "nonce": "0x12386014a1499ff743ffbe323e778e4bcee5866e3f82882eec9b50a998387d24",
    "signature": "0xe0f9cfafa36b706375ca04a6ead0059670c4454a79865d7592860d397d5718fa70c87edace1899e9f9c5bc493a72bdba79599e192efd3cbb71552c191617dd2c1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}