{
  "manageEntity": {
    "action": "Save",
    "entityId": "16642202",
    "entityType": "Track",
    "nonce": "0xe4dcfa147c48d7efd5fcb269426fa1a00be31b4388017df62bc4e295c93f825d",
    "signature": "0x7c13c90c3b9ec4073c863fea6b71df030652879f58fd2ba968473fe5a00342460122236b53d51c9eb4be24b29e800ec732e8563bf68554fbbe34bdf2795e148a1b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}