{
  "manageEntity": {
    "action": "Save",
    "entityId": "1250338066",
    "entityType": "Track",
    "nonce": "0x13b93bcf1ecd2806bd972337fcd60967f687a07fece2bcb76573a5ad6a85358c",
    "signature": "0xd07b7e4cc1c7b55626fe76d53a95b6b39c9a2538076ec7282787949f99768c4036c8f74d8e24719a36156191b135ca595f3820ed280bd6a42557f9da6fb1bba91b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}