{
  "manageEntity": {
    "action": "Save",
    "entityId": "461847030",
    "entityType": "Track",
    "nonce": "0x6ec77f6e11b0342dfc9480dc759bbb2f5884f6e7e87bd30db93e89e1559f383b",
    "signature": "0xf27a59c406bbd026e7ef9cc48f92ee19a1a7cd6b41bb35ed2d4cc68a1c94be3837c623887eb5fe8520c794a86d4c2020593961b0df42dc9f8abdc2ce478484361b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}