{
  "manageEntity": {
    "action": "Save",
    "entityId": "1838416217",
    "entityType": "Track",
    "nonce": "0x3d0a52fd7ed4963ec678f2361bd2f4c0411dbb5cd5e97be570a3f8878ad39cd8",
    "signature": "0x0a1e6815b13e9d6f103bff460a2d29dcf08c4e8a2fb48e5f5bb7ddb1de2c0cd65cda6bbbdf8c4f62cbd0752d66456e75ae8e006954ed847c2d9da7d8a24a91391b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}