{
  "manageEntity": {
    "action": "Save",
    "entityId": "252566",
    "entityType": "Track",
    "nonce": "0x314095c0dba28bd3bc356647472fa0b9cce27b8345860cd2878123604b37d629",
    "signature": "0xbde3bb3987437a8e0c97e11cf09ec5443d2f4e2e27da8a2b6892a6d35a8d84c9194034ea48d9d14ebc88604252cf712c6e823d0df1ecee24d142ef3d1eed28721c",
    "signer": "0xab28764Bd1224556ebA1d8Bc48d3f1F5D2e4E1dD",
    "userId": "281054123"
  }
}