{
  "manageEntity": {
    "action": "Save",
    "entityId": "895450207",
    "entityType": "Track",
    "nonce": "0x2c0e16f5284edfe70850731d79231ec1e05aebea1e2aff042f4fc37088f7717f",
    "signature": "0x7c23000ddd5e279499d3bd3bb562145c9a5f6c7b799ce3f4054d86df2622bc9950b188d04c0ebca326c8e01fd3fd26c2ee5858ca8696378fa35f13e98531345a1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}