{
  "manageEntity": {
    "action": "Save",
    "entityId": "293466834",
    "entityType": "Track",
    "nonce": "0x411f98de48923a1ac839ede2cf18cc8d897ee570e025ed54bbd2be727243356a",
    "signature": "0xdfb30ea17836c697a30262342fbca4bff6a75ca84c1bf8875be0d2f0bb1571c90f2d38b4ff7f6b83e76fda0b79d48978319b68744a9f888e27930b298d1d6dd61b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}