{
  "manageEntity": {
    "action": "Save",
    "entityId": "18245809",
    "entityType": "Track",
    "nonce": "0x17c9c662ad599f537fceef8d21740684feb0d17da5d8c1ab730ac2135c2160cf",
    "signature": "0x8aa688a78e200aea028feee0b2565116c80bb7a3fbad431782df08203cb5d2f6016080b922e54c06343c2d0bd6f700ca44fac5d4b99fc719a85efbc27b89ee4b1c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}