{
  "manageEntity": {
    "action": "Save",
    "entityId": "343434015",
    "entityType": "Track",
    "nonce": "0xf619dcf968bdb754e760fa19df35cf8c1f4c29fe8c999d7a37c95f03fa084cd0",
    "signature": "0xeccf3920e5e32fd4d6bc9cd1b17420deafd669f2431ccadacbe49f6cac9156c67b2e29fd093829fba6c65193686ffac7cf51862fb96c95a876c6f2c46ddd8ada1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}