{
  "manageEntity": {
    "action": "Save",
    "entityId": "260483342",
    "entityType": "Track",
    "nonce": "0x4dc398314382fde93e1119c7b40c8d9c5abbf5508f2c56dccf62bf991e631463",
    "signature": "0x251a6713215bcc633a6c8c09ffcbcfd2a9b0d089c36ae2d5763a819bed57108d480af80217bee8b1ec7eb4446c7949fdfb5dee585f07124985c9479350a9ce621b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}