{
  "manageEntity": {
    "action": "Save",
    "entityId": "13894652",
    "entityType": "Track",
    "nonce": "0x7f6a75d2415ff070bf677d2853e517b269128afe9efeb874fb6484efe1e2f07b",
    "signature": "0x20c75155682334f0c58cd6a485ff70dc19fb708d8db0efe02bfae8fa33b09f84035cfd59a8f7ac3d27826c84b7c14d4b7813d4f4688b8855190fa4acf147811e1b",
    "signer": "0x568426a5D555ADe94657d547B2Df4a4dc1f0C014",
    "userId": "71569007"
  }
}