{
  "manageEntity": {
    "action": "Save",
    "entityId": "968146660",
    "entityType": "Track",
    "nonce": "0x4d3bab7394166313bb8c5400aa797506d0a55ea134f02642e1b6239c6cd33dd8",
    "signature": "0x17e0aaba3e9d3a72ad87735b66687d0b7963733573c8180bbe49f8160eaeed5f5e8498314f83f2aed3ee414e7420d32a4112bcec649ff35e673305b93318aabe1b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}