{
  "manageEntity": {
    "action": "Save",
    "entityId": "564205303",
    "entityType": "Track",
    "nonce": "0x8d2abe09a81ea5fa50e854be55c1672e063ee650460ddc9cb93e6138c86fbcdc",
    "signature": "0xff8e5288044a29670eaff4793cae7eab2ebd86adfd4d637d9c6d0c62baab05e30e20cf2fa12ca241cfcf38de7a5fc76518c9afd61991097ac1d14d917eadcf9c1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}