{
  "manageEntity": {
    "action": "Save",
    "entityId": "60978257",
    "entityType": "Track",
    "nonce": "0xe4e0c101aac6a4ccbcf704532043c64a84cbb99ebb8e35693872d6e5cab5fe98",
    "signature": "0xfd5285884f54340c3684b3825ba9311e0c952392ab891a3ad30a1eac82ce1db360d66586cea9a165f49eca33cba6b04a645e5e77defb25e68c4ca0c617f35e681c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}