{
  "manageEntity": {
    "action": "Save",
    "entityId": "295224040",
    "entityType": "Track",
    "nonce": "0xa7aad7f80825a6d81140b0a2f9b49acbe8efc56fe2284a715d04c9bb5fe126a9",
    "signature": "0x6ea3e1d94713a42c45d55d5a943e22e36c065f08e4aa1f9ca6e6d213da9dce4f213ca8b1dd0d9a9c1d17abfd159efb969d4eeb6dfb29a691083e970c9840c17e1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}