{
  "manageEntity": {
    "action": "Save",
    "entityId": "1631968541",
    "entityType": "Track",
    "nonce": "0x60249e25345cb7caee85dc2c36b700148e1240db294d7ed1d9382211f4a9f683",
    "signature": "0xabdf2f51ce7c0f9225b6404874aa3a20e835d224906c0d10e4af2f25c8ef168c0d9d86d5b50422bc83a2852e70bbc981ad225548c672aa818a0a3250bf63c4631c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}