{
  "manageEntity": {
    "action": "Save",
    "entityId": "1937636702",
    "entityType": "Track",
    "nonce": "0xa01bc112ac3c7287e03d42c417d7ec3f216fb267b2b5748bcbda7668b6fe2f5f",
    "signature": "0xdb6eda84f0acc8b7a37d5bcce30899ec1f1721d9ce138883e19220cbd13403194b0131ec201c4b50d786217cd3e9035e082a5c650baac5cabac7e3c5bb19759f1c",
    "signer": "0x5d8091c5439F52184dFD827f33FF815dCc827bA8",
    "userId": "52403052"
  }
}