{
  "manageEntity": {
    "action": "Save",
    "entityId": "882093646",
    "entityType": "Track",
    "nonce": "0xf88626206f286d8fb746cb2e5d80e25a6fcde415dd43aa0ffda2fbeef3600a85",
    "signature": "0x5be4804ccb0ff01cab23b5a2bf56da737f2e0b9480c60de1dee1195fbb89fcd133db344ea86a52ae276386aed2c6aabf0c8b3cb8bcf5a8e1824b39680d5163751b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}