{
  "manageEntity": {
    "action": "Save",
    "entityId": "1669826788",
    "entityType": "Track",
    "nonce": "0xda231cf3fc605ef90dfedb85642dc035423d1a23047255a2da4afd58aa9eab2f",
    "signature": "0xa5fbb84aff690580142742d08b877f7c3e58fb7251ab1afc17e2c07b5d6d64320f5627c3498fe164e888597b9125fe27a24177e3094c3061218448c6ec78d5431c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}