{
  "manageEntity": {
    "action": "Save",
    "entityId": "943285373",
    "entityType": "Track",
    "nonce": "0x0fd1642917eaa3059fa234e1edae0d178abc9306120d67a8b85da85f7a4012cb",
    "signature": "0xb6bfd05be08b28b2bfb4d31f1ae9e9c1c8d9fd8115f8be52232d74801fa9dafd32980d2e8d4ce8055c6db16a4b0a0b7e6a7a66e5d68f566069d8e649fd8d3d651c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}