{
  "manageEntity": {
    "action": "Save",
    "entityId": "810432015",
    "entityType": "Track",
    "nonce": "0x3df2ab0545628dcc7e02ec21217c6b2ae80543459671556ca76ea968f703caec",
    "signature": "0x90f7f025160165a5391e7e443271aea6cfe918e5dda0cc5d3bc5e965dbd7abf533c0160d88cc4909fdd9d17c80d378e6765f694324e758a2d0cb591ab3ac133a1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}