{
  "manageEntity": {
    "action": "Save",
    "entityId": "138656113",
    "entityType": "Track",
    "nonce": "0x75659ff55599d6765e3f456d9725d3a973c2d4aea038b11293caa37ff38033f2",
    "signature": "0x807cf491c859ab88e0e0c9b7c17babe7424ae595fa7c32855f31606a4ff5c78b2053cfaf8431ea9e9d86504bcaf4691f64755163976fa8e98d9b6da090d95ced1c",
    "signer": "0x8739aB96B52ccc56d0E5226Ff69659162d4269A9",
    "userId": "320952162"
  }
}