{
  "manageEntity": {
    "action": "Save",
    "entityId": "446833",
    "entityType": "Track",
    "nonce": "0x6ce65e5e05af87a04e586dbaf40489935dbe7fd0e4f0fa8c461f4ae4fde57ecd",
    "signature": "0x176d4d8510c46035908534a4190ee9635bdf5658867acb0072e290fb94e3d02c604bda79cdc675edc4629cd0948886c2c780806a7cc2343b4802453e451d17231b",
    "signer": "0xAf1f176E32866fb97d822F6f5222061aF11ef652",
    "userId": "954117045"
  }
}