{
  "manageEntity": {
    "action": "Save",
    "entityId": "1114405397",
    "entityType": "Track",
    "nonce": "0x59935e67e9ad8df1e2858e55d99abf724cd833e12f1c736ad43c191ad0228782",
    "signature": "0x7a185a0a0f45672bb5400dc4240b67d63e02bbc8eaef3d602caa58541eda02940cefe471da0a6e95f8292aa747bc7c73ccccdcda590f763fe3f892a20440ef411c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}