{
  "manageEntity": {
    "action": "Save",
    "entityId": "178656141",
    "entityType": "Track",
    "nonce": "0x90804f3ddec45cb8f825f2b08a90c0b7d95df13940d172cf47f2d64f76f9f709",
    "signature": "0x1c4a6d68202f07acfaab3c6c1e0de64452e92c183d11d22880e3095f01aeedf157356f061f91d8d5eef6a7cc4547f5a6dbb51361d35a5eada31e1087fe83f8d81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}