{
  "manageEntity": {
    "action": "Save",
    "entityId": "8996",
    "entityType": "Track",
    "nonce": "0x4961e91a3e4f73997b853df11a6e063396d0fe1d38389617d4d62d2e19b74ed4",
    "signature": "0x211ac312765db9951049d0b339bb64f14866f0165de13bd2a147db8310040f9722cc3dd98e0b0a3000acd8b7b02246d3509154af992d03ba746fa21b373eb1361b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}