{
  "manageEntity": {
    "action": "Save",
    "entityId": "592049171",
    "entityType": "Track",
    "nonce": "0x74753e287b54aca1af365918aa3df982676b88040264be92efcc5ae883801eb0",
    "signature": "0x8b6fd118470119d84d880324613fdedbd69c0167dc4cbdf370838d2321b0e73a41e8fa4433a55cc9113ecb1a10f7b1cc5f9a49b68fa8d35d6f7941e30dc4c7d41b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}