{
  "manageEntity": {
    "action": "Save",
    "entityId": "682511",
    "entityType": "Track",
    "nonce": "0xf44121087954c0af692f14e92ca2cbc1b8899c1a410d88e2499ac18db8f9615d",
    "signature": "0x3f23ea38e21850db08a1696a6819ab346c5a23086d06f4db8d3021d8cabccc6b54b6348652fa41ad501682f61462fd8e4c0e9774cfb818fcd8665b47c88018601c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}