{
  "manageEntity": {
    "action": "Save",
    "entityId": "1020754650",
    "entityType": "Track",
    "nonce": "0x12464bff3c77c31e0ff622900def97c4548aac2c93152a33f4dc6ffe080c0095",
    "signature": "0xc0edf58fb3aba61471b734ec943839229db62f5937413052e3866d56baaac15b604ab97cce8aa75f7f9a4a2d5eba8a54c6874e72615819b8da9802307d0c51b41c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}