{
  "manageEntity": {
    "action": "Save",
    "entityId": "1038835286",
    "entityType": "Track",
    "nonce": "0xf83bd1f38b949cec421b993f954ce29c05422d1b560c63ad6fb4069cdd9d565e",
    "signature": "0x9f8384304fe1c0ea040b795eb5ed496c18c38a20f7fbf8c23cce80215bdccdb8522b8f10a018fe835da7feab5fac8dd8ca2a57dd2ed38e8e350952691339247b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}