{
  "manageEntity": {
    "action": "Save",
    "entityId": "948882406",
    "entityType": "Track",
    "nonce": "0x0bbeddda5a4ab9137e2476c2a45af7227aa4a7aa425c3380954ff86839561d6e",
    "signature": "0xf794a52cdc93700bbb9ff976d8fdb5029ffc6e1726f4c638389f0f926708520d6bc4e1b0a4b68f055e7dd91e806e6773a8b65175dd3a1324b5cfc84051d1bd3d1b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}