{
  "manageEntity": {
    "action": "Save",
    "entityId": "332812",
    "entityType": "Track",
    "nonce": "0xa29c116d2114d847c39f07b21b38250af1cc7ae698f3228929586a7269a90897",
    "signature": "0x4f8cf5d2b8dcf6e6d1d3c4a31dfbdeadb9782e5baaaa3c3582a0361c8a7c8fb45ff230a2863f6b87ce4bfe41c48daaa5fa33ddadfa9985a75e8cf4977dbaf9d21b",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}