{
  "manageEntity": {
    "action": "Save",
    "entityId": "1316948149",
    "entityType": "Track",
    "nonce": "0xe8391addc62a7dac918df2934116267915266da99e08835a04c7939a6a963d5b",
    "signature": "0x95413da25ed40890a2c63a7bc74ac149d1bd1c2d401c02bddc207727c5035bb24fc67d95595223c8ff444f5edf71f3687fb0bce4fe29cf162d36043e238389b71c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}