{
  "manageEntity": {
    "action": "Save",
    "entityId": "800190",
    "entityType": "Track",
    "nonce": "0x6c883ea9cfc7b6e57bd2691a7b18d8085605e4a63ded88ac887d8eb7eb7d157f",
    "signature": "0x2f9ea5c38e3dee32f7a81d4c9eeebceef240faefcf0792443b9e976fd22173e86510ef647a6cf83a064c6e4a57a336facabd6d46b2ef32b97d66b4450a0a93cc1b",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}