{
  "manageEntity": {
    "action": "Save",
    "entityId": "135843",
    "entityType": "Track",
    "nonce": "0x23e65575a4fa104ccb8adf21c9cd5808b8b0fe29537a7d76648f0294a074c593",
    "signature": "0xfa5c2399b2700ee79cb229451c06a9eea5005c8c9316f47b3099d9ae29034d2615220ed91c616d63c860e454341b2441cf3745db0658d04ac82a897f901132e71c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}