{
  "manageEntity": {
    "action": "Save",
    "entityId": "758330642",
    "entityType": "Track",
    "nonce": "0x4ecc24c54c7b0bf10317942b8ebfc5c4f8e8e4c0f45bde4f0f98f5ee36f79303",
    "signature": "0x753fd682cd22cb22baf9bf32b9e57479edf60ecb499b77f0f23277babf28a019277d9e757d10075c82c8a859d5a7347d0ef8f4a87483b2a570df95895fdd1e721c",
    "signer": "0x08932Ef00b65c7b2DA9fC2E8855f4199E5615480",
    "userId": "124711109"
  }
}