{
  "manageEntity": {
    "action": "Save",
    "entityId": "227516943",
    "entityType": "Track",
    "nonce": "0x871db22b150c7c8e87e38fdf5c8a559ae9dafc478834c7efc10246504a7c3403",
    "signature": "0x5801b00d1371ac9f8c96404106c95f4ddc30d3c0bf726512cff46e95e021190c7d55c14f512d0ebc5b2d860db2da0d78faef235f5ab230db9ed21d46928362041c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}