{
  "manageEntity": {
    "action": "Save",
    "entityId": "854781",
    "entityType": "Track",
    "nonce": "0x6b8f864e9b7e2242a427eb16f4a4f2481fe1d2ec468479b32d6395e15691fd34",
    "signature": "0xc2f6e4e83d9402ac210ebedc5514abd36f71f3f12018d85d47aaadcba85279ed1f1de9d05ef9467d013b03eea1964962cdb7ebe9bf6108254ee9d9f6cefdd16f1b",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}