{
  "manageEntity": {
    "action": "Save",
    "entityId": "1204045169",
    "entityType": "Track",
    "nonce": "0x6cbadd63d71929f48b614e07a4540262fc19964df88791c75454e29b4407d5de",
    "signature": "0x8346c0be7162d41aab81f75af7c4b6c05fd365af5bce65629be5207402bf22db6afe4df5b0577223be20a0def9e6a7b6aa6b3936360b2f24bd5aad78ad6557171b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}