{
  "manageEntity": {
    "action": "Save",
    "entityId": "713343701",
    "entityType": "Track",
    "nonce": "0xe227505bb419c4017a3150d5505b8eafc1ff06231fec366f1537520ab99afdc6",
    "signature": "0x44e6b43cb3f709f588f9a1061636142bf03e123a1f7e44a2ce6f3322be407cf862a9d6ca2cf192cef183cd0b7f5516ebfff9e77b3bc4adc9b9eacc566cb3e5fa1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}