{
  "manageEntity": {
    "action": "Save",
    "entityId": "590739106",
    "entityType": "Track",
    "nonce": "0xdeae54c1b13cdc48f084d29cb307a2b6b65eedd0edffa4b1416ac2e292ebf6ec",
    "signature": "0xfa68a7863202c99437a829fead182d1441b1a66e8ce2d94e23220ebdc081b856543585ea6d1324d265df88206bc056a3b90a417ac1ced41c6efb660ad679386f1c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}