{
  "manageEntity": {
    "action": "Save",
    "entityId": "701300363",
    "entityType": "Track",
    "nonce": "0x62b36d30ff9323bf6cfea244864fcbd275e64c33155c1673b46ed116ad06e54b",
    "signature": "0x1327d6e7238adb47b90a6bf7ed5ccf4f50434cb4374abcb82deac48641f73d7c4cc301ac0717435bac7a4f0831aac4f70f28ef17c218707f4ebb1b70aa5bfba11b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}