{
  "manageEntity": {
    "action": "Save",
    "entityId": "1723468564",
    "entityType": "Track",
    "nonce": "0x6690caea373442b0128661b9bfd996f3e6e1e1b1549969849ee53450c56460d1",
    "signature": "0xd8f4b70f7af0f1b81d0236fb01eb05cb64805e3b6b83baa70fc9cd6b63474e6124cb4f3e889b614c16d04b3bf4b8f65e00447faffdea9562655e1b4545ea43c61b",
    "signer": "0xD71D6a61b797d5436c8d291306fd7DbCe6257Cc2",
    "userId": "117522"
  }
}