{
  "manageEntity": {
    "action": "Save",
    "entityId": "753389540",
    "entityType": "Track",
    "nonce": "0x8dd1efc924ff6e6a532dcbe8b2437779d34485f5d44face92adbe17b90fe5747",
    "signature": "0x0b0293ce2fb5c88baa8082804b53336d4e9bc6029b487bbdd8acd58d62ca42717182be0d3c55554404a961ac1ab6d61f170059f7c11f316913e8dd05e32cf9da1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}