{
  "manageEntity": {
    "action": "Save",
    "entityId": "1918425801",
    "entityType": "Track",
    "nonce": "0xa55be2acd2f2ca6e3f54a8d3b0057cd443fea6e5bf72e539920cac461531d38b",
    "signature": "0xba49a6e60b5c44d8b08038e4d297356c44350c87f448e316f723fd2a5ab482b611458d27f6edb9d2c362a089b5ac00b95cb6d3c128c4ad26592cabf71ea7a0b71b",
    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}