{
  "manageEntity": {
    "action": "Save",
    "entityId": "995039919",
    "entityType": "Track",
    "nonce": "0xe74a67e25099f5520caac94c795289b63c6aca92e743ffcb62791587e85d5c4a",
    "signature": "0x0e12dfcecc5f1f4d4867352dd91c0f7f6e158ef3c2ac016642209b14691dde3624402f6973100eca8f7b77a364a73cdcf4606af95d80c2ab5d9edef2a74916d31c",
    "signer": "0x1816F6e4633FD46b2e614606143C41c41370D86a",
    "userId": "146164104"
  }
}