{
  "manageEntity": {
    "action": "Save",
    "entityId": "1345427244",
    "entityType": "Track",
    "nonce": "0x607be516335fb6d5c4c54a987d99527a82b432d87222f2bb0568d7990ad34bec",
    "signature": "0xbf52e25419b2ac119b39396f0f791e716d4c591ac4a17c3e42683b3f376a06c0049252032c1037d4769d255f8c29ded8f2f03d15e4ba1a95b02532870c656fc31b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}