{
  "manageEntity": {
    "action": "Save",
    "entityId": "1463327120",
    "entityType": "Track",
    "nonce": "0xd121150008c8ce2d4cef48185598f09a80d37d52da7ef52cc64921889d7b532e",
    "signature": "0x4362917837e2868c1ee88afdbe3c246677c052149f0d8abcc70bf4b545c11a337f40d9e39f871c4bacac7ab759fa1511c245ea227a0c64fe34d11bec582067bf1c",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}