{
  "manageEntity": {
    "action": "Save",
    "entityId": "1965546464",
    "entityType": "Track",
    "nonce": "0x11f24bdca85bfe765a18eaebafbb56d51478c522a2fdd02b6d39f81629439dc6",
    "signature": "0x3ac2548bf7f7aa6b629236d5291d25d859e3dabf8cc565b3f7fef5fa81189d650d3cb4c8cfaa8415ff709b8ad7d062d3a36f27829ff02bcb6d68906a5e4ae1151c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}