{
  "manageEntity": {
    "action": "Save",
    "entityId": "2038771857",
    "entityType": "Track",
    "nonce": "0x8928eda070a6a25202f9daf2bf5dcf3f7264ff5f3bccfa0c18a4c4563d7217f1",
    "signature": "0xabfca19dcee6aa7dd54c6fb51e757105e6a515ab3d8385393311bb684aa91d7d7d4e728d6fd8cceae93e0f7df742570638918d14698e0446e4cabf92918d5b5d1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}