{
  "manageEntity": {
    "action": "Save",
    "entityId": "1674001840",
    "entityType": "Track",
    "nonce": "0xb64fb752dcb80b1b5a7ab52b017d80a611e89a1dcb267bca406e1955877291a4",
    "signature": "0xb5c13608a03f00f645ce0bc71e89d666df87ad30afd5cf7f55739163fd99cf191eb152d4840e375b1a97de62d9e38fb91d90184599661ca9c7e16d4072efe3de1c",
    "signer": "0x0e08C058dE1787206F03B99840c282498259E9C4",
    "userId": "589495545"
  }
}