{
  "manageEntity": {
    "action": "Save",
    "entityId": "701177320",
    "entityType": "Track",
    "nonce": "0xff5ff4b3ba3b21b5ea62114d801ddddddfcf52b0a377448ffe01ffbe417e3d9d",
    "signature": "0x95280433aa289ea50e170624ffe296b2cb7c90a2f63250f9b514b10d0e60d3461f12211fd7fa4960ce1df67c3d87935eb075c3bcb32ddad585e981cc455596a91c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}