{
  "manageEntity": {
    "action": "Save",
    "entityId": "879508",
    "entityType": "Track",
    "nonce": "0xaa24a1b11315cc5b6d38a63f644fddcc55f7f5d2341a8eda8702399b8b047062",
    "signature": "0x3241e727a0544bc4b9aaf6306c4dcc017853e1efda29bf6feba7c20b2d9b461507c5c4c71dea230a37a498dd77d0c91d30d0e66f46fc424402561490b3ee43c71c",
    "signer": "0x061A60900C738C67bcf3F9Cb7Fe8f703DbEc8Ee0",
    "userId": "718327235"
  }
}