{
  "manageEntity": {
    "action": "Save",
    "entityId": "1155063455",
    "entityType": "Track",
    "nonce": "0x14506051b0e3cbdad6006e2c4c894f2e9b5935538e7dcb2f7c9bfe8029285df7",
    "signature": "0x6f308df51354a4e2d47970ff4a34bc82ce0110465e0ae88fb7478dc8f78cbd88313a17bc4f7e519157c5917903b71d02321acb863b17a29eaf04dffacdaa13a21c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}