{
  "manageEntity": {
    "action": "Save",
    "entityId": "109457",
    "entityType": "Track",
    "nonce": "0x4ec49899698db469889ec45283502702807739815799a5cecc0561f6fec4674f",
    "signature": "0x6c63ca6b2a6aef9ecb84a5f1d6b3421d7c1ce1988e2b8d40b60250dccd1f3ee63a086bbfe6daaf1d96bcf96e9add4176617a0768f8eb8a5348416e9a72ac86671c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}