{
  "manageEntity": {
    "action": "Save",
    "entityId": "699711",
    "entityType": "Track",
    "nonce": "0xd552ac00729728779542ecb9f7bc9b6c6672a3deb8d886d22f3183c4fc013981",
    "signature": "0x001f521997b1cb03a37d24d85ea6b56083ff0b323beb5aedf9c43c235600965928e69c97348c495d9ec8e80a6aa0deaec3e70619593ff044c499671a9cbf88641c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}