{
  "manageEntity": {
    "action": "Save",
    "entityId": "323319",
    "entityType": "Track",
    "nonce": "0xf4038a9b710cb38b1ac9a2c2ce0967afdfbdfa5727ede32dc7a0019c3feca095",
    "signature": "0x9c45c5f409cb49bfcebcfee03e5ad73a38f5c94bc3fcc6359244ce4978707d3a1cf707f535773699d27372aad99aa90b70fbb430ff6f46de699aba6846e7d76a1c",
    "signer": "0x5ED46E41387B4d8a2fc3cae6eBb7D76BE8b09c15",
    "userId": "971831429"
  }
}